On the 26th of January hundreds of mostly young male illegal immigrants organized a protest In the German town of Halberstadt demanding a right to "asylum" and permanent residence. You can hear them shouting "we want asylum" and "we want a right to stay" in broken German. Under no legislation do they have a right for asylum in any European nation - or any country on earth for that matter. Their protest was organized illegally and surprised the authorities.
None of these men refugees. They're economic migrants from any 3rd world nation but Syria. And even if they were legitimate refugees from Syria, current law states that any refugee must apply for asylum status in the first safe country he reaches.
Germany is surrounded entirely by safe nations so not a single migrant has any right to stay here whatsoever, under no law, neither national nor European.
These young men spent thousands of Euros to human traffickers to reach Germany or Sweden and traveled through a dozen nations, so they'd hate to have wasted their investment and prospect of a life on benefits and access to European women - so they get angry.
Authorities have lost track exactly how many illegal immigrants are currently in Germany. The worst estimates claim that almost 300,000 people reside in Germany undocumented and illegally.